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Agilent E8462A Scanning Voltmeter Application Examples

117

Chapter 4

Chapter 4

Agilent E8462A Scanning Voltmeter

Application Examples

Using This Chapter

This chapter gives application information and examples for using the
Agilent E8462A 256-Channel Relay Multiplexer to make measurements
with the Agilent E1411B (or Agilent E1326B used with a C-size adapter
installed in the C-size mainframe) 5½-Digit Multimeter in the scanning
voltmeter configuration.

This chapter contains the following sections:

•

Reset Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 118

•

The Scanning Voltmeter . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 119

•

Making Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 120

•

Scanning Voltmeter Command Quick Reference . . . . . . . . . Page 122

Note

The multimeter must be the Agilent E1411B (or the E1326B used with a
C-size adapter installed in the C-size mainframe). The device driver for
these two multimeters controls Agilent switches in the scan mode. The
scanning voltmeter configuration does not use the “SWITCH” switchbox
device driver and therefore, you do not use the switchbox command
reference in Chapter 3. Instead you use the “VOLTMTR” device driver and
the Agilent E1411B multimeter command reference. The “VOLTMTR”
device driver was provided with the E8462A multiplexer. See “Initial
Operation” on page 33 for more information on the “SWITCH” and
“VOLTMTR” drivers. The multimeter's command quick reference from
the

Agilent E1326B/E1411B 5½-Digit Multimeter User's Manual

is provided at

the end of this chapter for your convenience. Refer to your multimeter
manual for detailed descriptions of the commands.

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Summary of Contents for E8462A

Page 1: ...ter Based Programming This Manual VXIplug play programming VXIplug play Online Help VXIplug play example programs VXIplug play Online Help VXIplug play function reference VXIplug play Online Help Soft...

Page 2: ...x...

Page 3: ...e 17 Connecting Field Wiring 18 Field Wiring Not Using Optional Terminal Cards 18 Field Wiring Terminal Connector 18 Front Panel Connector Pin Out 19 Connecting the Analog Bus 23 Terminal Cards 24 Pro...

Page 4: ...This Chapter 67 Command Types 67 Common Command Format 67 SCPI Command Format 67 Linking Commands 68 Parameters 69 SCPI Command Reference 70 ABORt 71 ARM 72 ARM COUNT 72 ARM COUNt 72 DIAGnostic 74 DI...

Page 5: ...s OPERation ENABle 103 STATus OPERation EVENt 103 STATus PRESet 104 SYSTem 105 SYSTem CDEScription 105 SYSTem CPON 106 SYSTem CTYPe 106 SYSTem ERRor 107 TEST 108 TEST NUMBer 108 TRIGger 110 TRIGger IM...

Page 6: ...128 Appendix B Register Based Programming 129 About This Appendix 129 Register Addressing 129 The Base Address 129 Register Offset 132 Register Descriptions 133 ID Register 134 Device Type Register 13...

Page 7: ...site preparation or maintenance 7 TO THE EXTENT ALLOWED BY LOCAL LAW THE ABOVE WARRANTIES ARE EXCLUSIVE AND NO OTHER WARRANTY OR CONDITION WHETHER WRITTEN OR ORAL IS EXPRESSED OR IMPLIED AND AGILENT S...

Page 8: ...g the removal of covers or shields are for use by service trained personnel only Under certain conditions dangerous voltages may exist even with the equipment switched off To avoid dangerous electrica...

Page 9: ...to obtain the Declaration of Conformity Go to http regulations corporate agilent com DoC search htm You can then search by product number to find the latest Declaration of Conformity Alternately you...

Page 10: ...8 Notes...

Page 11: ...9 Notes...

Page 12: ...10 Notes...

Page 13: ...ng the Multiplexer Page 29 Initial Operation Page 32 Module Description Figure 1 1 shows the Agilent E8462A armature relay multiplexer simplified block diagram Option 014 or 015 Terminal Card and a si...

Page 14: ...canning Voltmeter configuration See Chapter 4 for information on using the E8462A in a scanning voltmeter Optional Terminal Cards The E8462A has three optional terminal cards which you may purchase fr...

Page 15: ...Configuring the Agilent E8462A Multiplexer 13 Figure 1 1 Agilent E8462A Simplified Schematic...

Page 16: ...CRMS or 60VDC Caution MAXIMUM VOLTAGE CURRENT Maximum allowable voltage per channel terminal to terminal or terminal to chassis for the Multiplexer is 200 VDC 140 VACrms or 200VACpeak Maximum switchin...

Page 17: ...rce manager when it encounters a module with address 255 The logical address must be a multiple of eight e g 112 120 128 etc when using a VXIbus command module An instrument must have a unique seconda...

Page 18: ...ine These protection resistors limit the maximum current through the relays However in some measurements such as 2 Wire resistance measurements you may want to bypass the protection resistors Each res...

Page 19: ...to install the Multiplexer in a mainframe Figure 1 4 Installing the Multiplexer in a VXIbus Mainframe NOTE The extraction levers will not seat the backplane connectors on older VXIbus mainframes You m...

Page 20: ...crimp tool Agilent P N 8710 2306 or ERNI P N 014374 and option ally a disassembly tool Agilent P N 8710 2307 or ERNI P N 471555 Caution Due to the close terminal spacing and the potential for pin to p...

Page 21: ...acts or terminal cards However terminal cards can be ordered as an option In Figure 1 6 columns C1 and C2 contain the terminals for the 16 line multiplexer bus Ter0 to Ter15 as well as terminals for T...

Page 22: ...129 CH 161 T_ERROR CH 193 CH 225 CH 130 CH 162 Reserved CH 194 CH 226 CH 131 CH 163 Terminal 8 CH 195 CH 227 CH 132 CH 164 Reserved CH 196 CH 228 CH 133 CH 165 XVCC CH 197 CH 229 CH 134 CH 166 Reserve...

Page 23: ...CH 96 HI CH 65 HI CH 65 LO T_ERROR CH 97 LO CH 97 HI CH 66 HI CH 66 LO Reserved CH 98 LO CH 98 HI CH 67 HI CH 67 LO Terminal 8 CH 99 LO CH 99 HI CH 68 HI CH 68 LO Reserved CH 100 LO CH 100 HI CH 69 H...

Page 24: ...HI 1 CH 32 LO 1 T_ACCESS CH 32 LO 2 CH 32 HI 2 CH 33 HI 1 CH 33 LO 1 T_ERROR CH 33 LO 2 CH 33 HI 2 CH 34 HI 1 CH 34 LO 1 Reserved CH 34 LO 2 CH 34 HI 2 CH 35 HI 1 CH 35 LO 1 Terminal 8 CH 35 LO 2 CH...

Page 25: ...o Figure 1 9 Figure 1 9 Agilent E1411B Connections to the Analog Bus Note The Option 014 and 015 Terminal Cards distribute the analog bus from P109 in the Terminal Card An external measuring device ca...

Page 26: ...2306 or ERNI Components P N 014374 and optionally a disassembly tool P N 8710 2307 or ERNI Components P N 471555 Caution The Agilent E8462A Option 012 Crimp and Insert Terminal Block connectors must b...

Page 27: ...bon Cable Connector Terminal Block Option 015 Terminal Block provides nine ribbon cable header connectors This option is identical to option 014 but does not have fault protection PTC resistors Zero o...

Page 28: ...26 Configuring the Agilent E8462A Multiplexer Wiring a Terminal Card Figure 1 11 shows how to connect wire to the optional terminal blocks Figure 1 11 Wiring a Terminal Card...

Page 29: ...Configuring the Agilent E8462A Multiplexer 27 Figure 1 11 Wiring a Terminal Card continued See Figure 1 12 for more detail Mark the last digit of the MUX model number e g E8462...

Page 30: ...E8462A Multiplexer Attaching a Terminal Block to the Multiplexer Figure 1 12 shows how to attach an optional terminal block to the Agilent E8462A Relay Multiplexer module Figure 1 12 Attach a Termina...

Page 31: ...s channel_list has the form ccbnnn where cc module card number 01 99 b bank or MUX number 0 to one less than banks or muxes and nnn channel numbers The channel number consists of three parts listed in...

Page 32: ...tifies the module within a multiple switching cards The card number assigned depends on the switch configuration used Leading zeroes can be ignored for the module card number Single module In a single...

Page 33: ...nnel range must be from a lower channel number to a higher channel number For example CLOS 1000 1015 is acceptable but CLOS 1015 1000 generates an error Using the channel range cc0000 cc9999 with the...

Page 34: ...ter states after the last command executed by the driver The driver record of register states is not updated by a register write only the register value is changed Therefore the driver will not know t...

Page 35: ...char ch_state channel open close state Open the default resource manager errStatus viOpenDefaultRM viRM if VI_SUCCESS errStatus printf ERROR viOpenDefaultRM returned 0x x n errStatus return errStatus...

Page 36: ...state Open Channel 002 errStatus viPrintf E8462A OPEN 10002 n if VI_SUCCESS errStatus printf ERROR viPrintf returned 0x x n errStatus return errStatus Close the Module Instrument Session errStatus viC...

Page 37: ...one TRIGger SOURce IMM Advances through a scanning list automatically INITiate CONTinuous OFF Continuous scanning disabled OUTPut STATe OFF Trigger output from EXT TTL or ECL sources is disabled ROUT...

Page 38: ...plexer s operating mode with the ROUTe FUNCtion command before executing the ROUTe CLOSe OPEN or SCAN functions This closes the appropriate tree relays configuring the module for the specified mode Se...

Page 39: ...rements Valid channel numbers are 000 through 127 From the perspective of the 1 Wire mode channel 000 becomes channel 000 HI channel 032 becomes channel 000 LO etc Refer to Figure 1 7 on page 21 3 Wir...

Page 40: ...rminal bus line to route all channels to Ter0 1 wire Valid Channel List All 256 channels 000 255 Analog Bus All the channels can be also connected to analog bus line H1 by closing AB200 CH9200 and tog...

Page 41: ...s C100 and C108 remain connected to Ter0 Valid Channel List 000 127 Analog Bus All the channels can be also connected to analog bus lines H1 and L1 by closing AB200 CH9200 and AB201 CH9201 SCPI Exampl...

Page 42: ...04 For 4 Wire measurements you would typically use a pair of channels from banks 0 and 2 for the voltage sense and another pair of channels from banks 4 and 6 for the current source these four channel...

Page 43: ...Using the Multiplexer 41 NOTE See Figure 1 8 for 3 wire and 4 wire front panel pin out Figure 2 3 3 Wire and 4 wire Operating Mode 3 Wire uses Ter0 Ter1 and Ter4 4 Wire uses Ter0 Ter1 Ter4 and Ter5...

Page 44: ...onfigured as two 128 x 1 or two 64 x 2 multiplexers Figure 2 4 illustrates these configurations Front Panel Pin out See Figure 1 6 for 1 wire or Figure 1 7 for 2 wire Figure 2 4 Two 1 x 128 or Two 2 x...

Page 45: ...re connected to eight terminal bus Terminals 0 2 4 6 8 10 12 14 by closing 16 related tree relays These modes are automatically set with the ROUTe FUNC command which automatically sets the appropriate...

Page 46: ...connected to eight terminal bus Terminals 0 2 4 6 8 10 12 14 by closing 16 related tree relays These modes are automatically set with the ROUTe FUNC command which automatically sets the appropriate t...

Page 47: ...channel list continuously until the scan is aborted The TRIGger SOURce command specifies the source to advance the scan The OUTPut command can be used to enable the E1406A Command Module s Trig Out p...

Page 48: ...VM Input and I terminals on P109 connector see Figure 1 1 on page 13 Synchronizing the Multiplexer with a Multimeter This example uses the TTL VXIbus triggers TTLT 0 7 to synchronize channel closures...

Page 49: ...340 or 82341 GPIB module installed and properly configured in your PC An Agilent E1406 Command Module is required This following example resets and configures the multimeter for DC Voltage measurement...

Page 50: ...pen viRM MULTI_ADDR VI_NULL VI_NULL E1412A if VI_SUCCESS errStatus printf ERROR viOpen returned 0x x n errStatus Reset the Multimeter clear status system errStatus viPrintf E1412A RST CLS n if VI_SUCC...

Page 51: ...errStatus viPrintf E8462A OUTP TTLT0 ON n if VI_SUCCESS errStatus printf ERROR viPrintf returned 0x x n errStatus Set Trigger Input On TTL 1 errStatus viPrintf E8462A TRIG SOUR TTLT1 n if VI_SUCCESS e...

Page 52: ...atus for ii 0 ii 10 ii printf Reading d is lf n ii readings ii Reset E8462A to open all channels errStatus viPrintf E8462A RST n if VI_SUCCESS errStatus printf ERROR viPrintf returned 0x x n errStatus...

Page 53: ...ve been scanned The actual C language program is similar to the previous example and will not be presented again Hybrid MUX Configuration The module can be configured into segments of channels that ar...

Page 54: ...closed ARM COUNt Value TRIGger SOURce Mode OUTPut STATe Configuration INITiate CONTinuous Mode ROUTe FUNCtion Mode ROUTe SCAN MODE Mode ROUTe SCAN PORT Mode DIAGnostic SCAN DELay Time DIAGnostic INTe...

Page 55: ...ns as programmed If errors do occur the Multiplexer interrupts the computer and the error codes and messages are read from the error queue Analog Bus 2 Wire Resistance Measurements ROUTe SCAN MODE RES...

Page 56: ...ree relay T1 connects channels 16 31 to Ter0 and channels 48 63 to Ter1 Tree relays T2 through T7 make similar connections to Ter0 and Ter1 The routing relay C100 toggles between terminal lines Ter0 a...

Page 57: ...ch 13 157 bank 5 ch 13 221 bank 7 ch 13 30 bank 1 ch 14 94 bank 3 ch 14 158 bank 5 ch 14 222 bank 7 ch 14 31 bank 1 ch 15 95 bank 3 ch 15 159 bank 5 ch 15 223 bank 7 ch 15 32 bank 0 ch 0 96 bank 2 ch...

Page 58: ...3 30 HI bank 1 ch 14 30 LO bank 1 ch 14 94 HI bank 5 ch 14 94 LO bank 5 ch 14 31 HI bank 1 ch 15 31 LO bank 1 ch 15 95 HI bank 5 ch 15 95 LO bank 5 ch 15 32 HI bank 0 ch 0 32 LO bank 2 ch 0 96 HI bank...

Page 59: ...29 LO2 bank 3 ch 13 30 HI1 bank 1 ch 14 30 LO1 bank 1 ch 14 30 HI2 bank 3 ch 14 30 LO2 bank 3 ch 14 31 HI1 bank 1 ch 15 31 LO1 bank 1 ch 15 31 HI2 bank 3 ch 15 31 LO2 bank 3 ch 15 32 HI1 bank 4 ch 0...

Page 60: ...h 13 29 bank 5 ch 13 93 bank 7 ch 13 30 bank 1 ch 14 94 bank 3 ch 14 30 bank 5 ch 14 94 bank 7 ch 14 31 bank 1 ch 15 95 bank 3 ch 15 31 bank 5 ch 15 95 bank 7 ch 15 32 bank 0 ch 0 96 bank 2 ch 0 32 ba...

Page 61: ...ch 13 29 bank 3 ch 13 29 bank 5 ch 13 29 bank 7 ch 13 30 bank 1 ch 14 30 bank 3 ch 14 30 bank 5 ch 14 30 bank 7 ch 14 31 bank 1 ch 15 31 bank 3 ch 15 31 bank 5 ch 15 31 bank 7 ch 15 32 bank 0 ch 0 32...

Page 62: ...3 29 bank 2 ch 13 29 bank 4 ch 13 29 bank 6 ch 13 30 bank 0 ch 14 30 bank 2 ch 14 30 bank 4 ch 14 30 bank 6 ch 14 31 bank 0 ch 15 31 bank 2 ch 15 31 bank 4 ch 15 31 bank 6 ch 15 MUX1 MUX3 MUX5 MUX7 0...

Page 63: ...ch 13 29 LO bank 5 ch 13 30 HI bank 1 ch 14 30 LO bank 1 ch 14 30 HI bank 5 ch 14 30 LO bank 5 ch 14 31 HI bank 1 ch 15 31 LO bank 1 ch 15 31 HI bank 5 ch 15 31 LO bank 5 ch 15 32 HI bank 0 ch 0 32 LO...

Page 64: ...13 29 HI bank 5 ch 13 29 LO bank 5 ch 13 30 HI bank 1 ch 14 30 LO bank 1 ch 14 30 HI bank 5 ch 14 30 LO bank 5 ch 14 31 HI bank 1 ch 15 31 LO bank 1 ch 15 31 HI bank 5 ch 15 31 LO bank 5 ch 15 MUX1 MU...

Page 65: ...13 13 HI bank 5 ch 13 13 LO bank 5 ch 13 14 HI bank 1 ch 14 14 LO bank 1 ch 14 14 HI bank 5 ch 14 14 LO bank 5 ch 14 15 HI bank 1 ch 15 15 LO bank 1 ch 15 15 HI bank 5 ch 15 15 LO bank 5 ch 15 MUX2 M...

Page 66: ...bank 3 ch 13 29 LO2 bank 3 ch 13 30 HI1 bank 1 ch 14 30 LO1 bank 1 ch 14 30 HI2 bank 3 ch 14 30 LO2 bank 3 ch 14 31 HI1 bank 1 ch 15 31 LO1 bank 1 ch 15 31 HI2 bank 3 ch 15 31 LO2 bank 3 ch 15 MUX1 0...

Page 67: ...bank 3 ch 13 13 LO2 bank 3 ch 13 14 HI1 bank 1 ch 14 14 LO1 bank 1 ch 14 14 HI2 bank 3 ch 14 14 LO2 bank 3 ch 14 15 HI1 bank 1 ch 15 15 LO1 bank 1 ch 15 15 HI2 bank 3 ch 15 15 LO2 bank 3 ch 15 MUX2 0...

Page 68: ...66 Using the Multiplexer...

Page 69: ...orm functions like reset self test status byte query and so on Common commands are four or five characters in length always begin with the asterisk character and may include one or more parameters The...

Page 70: ...ptable Implied Commands Implied commands are those which appear in square brackets in the command syntax Note that the brackets are not part of the command and are not sent to the instrument Suppose y...

Page 71: ...to 1 In OUTPut TTLTrgn n can range from 0 through 7 Parameters Parameter Types The following table contains explanations and examples of parameter types you might see later in this chapter Parameter...

Page 72: ...parameter the present ARM COUNt value is returned If you send the MIN parameter the command returns the minimum count available If you send the MAX parameter the command returns the maximum count ava...

Page 73: ...face When a scan is enabled via an interface an interface clear command CLEAR 7 can be used to stop the scan When the scan is enabled via the interface and TRIG SOUR BUS or HOLD is set you can use ABO...

Page 74: ...r MAX for the number of scanning cycles Related Commands ABORt INITiate IMMediate RST Condition ARM COUNt 1 Example Setting Ten Scanning Cycles This example sets a multiplexer module for 10 scans of c...

Page 75: ...er of Scans This example sets a multiplexer module for 10 scanning cycles and queries the number of scan cycles set The ARM COUN command returns 10 ARM COUN 10 Set 10 scans per INIT command ARM COUN Q...

Page 76: ...omments The module s fuse register identifies good fuses on bits 0 1 2 and 3 as noted in the following table A good fuse is idicated by the bit being 1 A 0 bit indicates the associated banks are not r...

Page 77: ...INTerrupt LINE card_number queries the module s VXI backplane interrupt line and the return value is one of 1 2 3 4 5 6 7 which corresponding to the module s interrupt line 1 7 The return value being...

Page 78: ...en command is given before sending an interrupt and clearing the busy bit RST does not change the selected time Example Delay the interrupt signal 8 mS after a relay is opened or closed DIAG INT TIM 2...

Page 79: ...Parameters Comments Example Set the scan delay time for scanning operations DIAG SCAN DEL 2 005 5 mS scan delay setting on card number 2 DIAGnostic SCAN DELay DIAGnostic SCAN DELay card_number queries...

Page 80: ...Nitor CARD card_number AUTO CARD STATe mode STATe DISPlay MONitor CARD DISPlay MONitor CARD card_number AUTO selects the module in a switchbox to be monitored NOTE You must use DISP MON STAT ON to act...

Page 81: ...Channel Multiplexer is as follows WIRE1 WIRE1x2 WIRE1x4 and WIRE1x8 Displays Closed channels are identified in each mux A closed relay on each mux will be displayed for all 1 wire modes WIRE1 WIRE1x2...

Page 82: ...n H0000 where the hexidecimal value 0008 for B4 indicates channel 3 in bank 4 is closed channel 3 in bank 6 is paired with this channel and is also closed The hexidecimal value 0810 for T0 the Tree ba...

Page 83: ...ntinuous scanning is enabled with the INITiate CONTinuous OFF or INITiate CONTinuous 0 command Sending the INITiate IMMediate command closes the first channel in the channel list Each trigger from the...

Page 84: ...list Successive triggers from the source specified by the TRIGger SOURce command advance the scan through the channel list Comments Starting the Scanning Cycle The INITiate IMMediate command starts s...

Page 85: ...nabling ECL Trigger Bus When enabled a pulse is output from the selected ECL Trigger bus line 0 or 1 after each channel is closed during a scan If disabled a pulse is not output The output is a negati...

Page 86: ...1 enables the port and OFF 0 disables the port Parameters Comments Enabling Trig Out Port When enabled a pulse is output from the Trig Out port after each scanned switchbox channel is closed If disab...

Page 87: ...ables OFF or 0 the specified TTL Trigger bus line Parameters Comments Enabling TTL Trigger Bus When enabled a pulse is output from the selected TTL Trigger bus line 0 to 7 after each channel in the sw...

Page 88: ...ch scanned channel is closed OUTPut TTLTrgn STATe OUTPut TTLTrgn STATe Queries the present state of the specified TTL Trigger bus line The command returns 1 if the specified TTLTrg bus line is enabled...

Page 89: ...OUTe CLOSe ROUTe CLOSe channel_list Closes the multiplexer channels specified by channel_list Channel_list has the form ccbnnn where cc card number 01 99 b bank or MUX number 0 one less than number of...

Page 90: ...inal Closing Channels Any combination of the above channel lists is valid in one command Parameter Name Parameter Type Mode Range of Values channel_list numeric WIRE2X4 cc0000 to cc0031 cc1000 to cc10...

Page 91: ...tch C108 in Figure 1 1 9200 to 9204 to connect the banks to the analog bus These switches are labeled AB200 AB204 in Figure 1 1 9200 connects analog H1 to switch C108 9108 9201 connects analog L1 to t...

Page 92: ...ogrammed to be closed 1 1 is returned CLOS 10000 20067 10000 closes channel 0 card 1 and 20067 closes channel 67 card 2 CLOS 10000 20067 Query state of channel 0 card 1 and channel 67 card 2 ROUTe FUN...

Page 93: ...wo wire by 1 MUX 2 MUXs 4 MUXs or 8 MUXs A pair of wires is connected to the common terminal pair by closing a double pole relay A single channel closure will connect both wires Three Wire Modes WIRE3...

Page 94: ...ne wire mode is selected WIRE1 is returned FUNC 1 WIRE1 Configures card 1 to one wire mode FUNC 1 Query mode of card 1 ROUTe OPEN ROUTe OPEN channel_list Opens the multiplexer channels specified by ch...

Page 95: ...cc0000 to cc0255 cc0000 to cc0127 cc0000 to cc0063 cc0000 to cc0063 WIRE1X2 cc0000 to cc0127 cc1000 to cc1127 WIRE2X2 cc0000 to cc0063 cc1000 to cc1063 WIRE4X2 cc0000 to cc0031 cc1000 to cc1031 WIRE1...

Page 96: ...listed must be greater than the first channel specified Opening the Control Relays The control relays 9000 to 9021 9100 to 9108 9200 to 9204 can be opened to perform special functions for example isol...

Page 97: ...N 100 267 100 opens channel 0 of card 1 and 267 opens channel 67 of card 2 ROUTe OPEN ROUTe OPEN channel_list Returns the current state of the channel s queried Channel_list has the form ccbnnn see RO...

Page 98: ...to cc0063 cc1000 to cc1063 WIRE4X2 cc0000 to cc0031 cc1000 to cc1031 WIRE1X4 cc0000 to cc0063 cc1000 to cc1063 cc2000 to cc2063 cc3000 to cc3063 channel_list numeric WIRE2X4 cc0000 to cc0031 cc1000 t...

Page 99: ...el specified Multiple Scanning Operations NOT Allowed The SCAN command does not allow multiple scanning operations even when the module is configured to one of the multiple MUX modes e g WIRE1X2 WIRE2...

Page 100: ...ter s current source When SCAN PORT ABUS is selected control relays 9203 and 9204 are also closed to connect Analog H2 and Analog L2 which are the Analog Bus connections to the Ohmmeter s current sour...

Page 101: ...the ROUTe FUNCtion and ROUTe SCAN MODE commands Then followed by the ROUTe SCAN PORT and ROUTe SCAN channel_list commands Analog Bus Connection The SCAN PORT ABUS command only connects disconnects the...

Page 102: ...og Control Relay 9203 is opened if the mode is not VOLT 9203 is closed RST Condition ROUTe SCAN PORT NONE Example Selecting the Analog Bus Port This example selects the four wire ohms measurement mode...

Page 103: ...he STB command Use the ESE command to query the unmask value for the Standard Event Status Register the bits you want logically OR d into the summary bit The registers are queried using decimal weight...

Page 104: ...102 Agilent E8462A Relay Multiplexer Command Reference...

Page 105: ...7 of the Status Register STATus OPERation ENABle 256 sets bit 7 of the Status Register to 1 after bit 8 of the Operation Status Register is set to 1 Related Commands ROUTe SCAN Example Enabling the S...

Page 106: ...Nt command clears it Aborting a scan Aborting a scan will leave bit 8 set to 0 Related Commands ROUTe SCAN Example Reading the Operation Status Register After a Scanning Cycle STAT OPER Returns the bi...

Page 107: ...IRE1 Sets mode to one wire Parameter Name Parameter Type Range of Values Default Value number numeric 1 through 99 N A FUNCtion Mode Description NONE User defined mode 8 x 16 Channel GP Relay Mux WIRE...

Page 108: ...er or RST commands In addition these commands do not affect the DIAGnostic INTerrupt or DIAGnostic INTerrupt TIMer commands Example Setting Card 1 Module to its Power on State SYST CPON 1 Sets card 1...

Page 109: ...rom the queue each time the SYSTem ERRor command is sent The errors are cleared first in first out When the queue is empty each following SYSTem ERRor command returns 0 No error To clear all error num...

Page 110: ...n are the same as the error codes given by the TST query and are summarized in the following table Parameter Name Parameter Type Range of Values Default Value test_number numeric cc 1 through 99 N A c...

Page 111: ...all relays on the card cc99 This is a special test that scans through all relays DO NOT USE this test when the card has terminal block connections NOTE The Multiplexer function must be set to the eigh...

Page 112: ...iate will execute BUS or HOLD Source If selected the TRIGger SOURce BUS or TRIGger SOURce HOLD commands remain in effect after triggering a switchbox with the TRIGger IMMediate command Related Command...

Page 113: ...cted One Trigger Input Selected at a Time Only one input ECLTrg0 or 1 TTLTrg0 1 2 3 4 5 6 or 7 or EXTernal can be selected at one time Enabling a different trigger source will automatically disable th...

Page 114: ...ds ABORt ROUTe SCAN OUTPut RST Condition TRIGger SOURce IMMediate Example Scanning Using External Triggers This example uses external triggering TRIG SOUR EXT to scan bank 0 channels 0 through 7 of a...

Page 115: ...e switchbox Command returns BUS ECLT EXT HOLD IMM or TTLT for sources BUS ECLTrgn EXTernal HOLD IMMediate or TTLTrgn respectively Example Querying the Trigger Source This example sets external trigger...

Page 116: ...channel list for scanning Sets ARM COUN 1 TRIG SOUR IMM and INIT CONT OFF DIAG SCAN DEL 0 0 SAV numeric state Stores the instrument state but does not save the scan list SRE register value Service req...

Page 117: ...state Enables Disables TTL Trigger bus line pulse Query TTL Trigger bus line state ROUTe CLOSe channel_list CLOSe channel_list FUNCtion card_number function FUNCtion card_number OPEN channel_list OPEN...

Page 118: ...116 Agilent E8462A Relay Multiplexer Command Reference...

Page 119: ...ultimeter must be the Agilent E1411B or the E1326B used with a C size adapter installed in the C size mainframe The device driver for these two multimeters controls Agilent switches in the scan mode T...

Page 120: ...oltmeter address all 256 channels and the tree relays are open All E8462A routing relay common terminals are set to the normally closed contact In addition after a RST command the current scan channel...

Page 121: ...og bus The E1326 E1411 multimeter automatically controls the channels and tree relays when you use the MEASure or CONFigure commands Tree relays are described in Table 4 2 Table 4 1 Agilent E8462A Def...

Page 122: ...command is used to both specify the channel list to scan and to make measurements Scanning Voltmeter Measurement Program This example scans a list of multiplexer channels and makes a measurement on ea...

Page 123: ...AS FRES 100 131 NOTE 4 wire channels are made by pairing banks 0 and 2 banks 1 and 3 banks 4 and 6 and banks 5 and 7 Two lines from each bank will automatically be paired to form the 4 wire channel 10...

Page 124: ...onitor mode FETCh Place stored readings in output buffer FORMat DATA type length Select output data format and length FORMat Query format INITiate IMMediate Place multimeter in wait for trigger state...

Page 125: ...integration time Select range Query range Set integration time in PLCs Query integration time Enable disable autoranging Query autorange mode Specify resolution Query resolution SYSTem CDEScription ca...

Page 126: ...124 Agilent E8462A Scanning Voltmeter Application Examples Chapter 4 Notes...

Page 127: ...re to climatic conditions such as direct sunlight wind rain snow sleet and icing water spray or splash hoarfrost frost or dew Pollution Environment Pollution environment for which this product may be...

Page 128: ...n 014 or Option 015 Terminal Block The ribbon cable header connectors on the Agilent E8462A Option 014 or Option 015 Terminal Card must be replaced after 15 000 hours of 50Vrms voltage stress due to t...

Page 129: ...Configuration 100 Protection Resistor Shorted 256 1 1 wire 6 0 MHz 128 1 2 wire 12 0 MHz 32 1 2 wire 30 0 MHz Configuration to Chassis To open Channel 256 1 620 pF 410 pF 128 1 340 pF 220 pF 32 1 160...

Page 130: ...t its contact resistance increases When the resistance exceeds a predetermined value the relay should be replaced Stability of Contact Resistance The stability of the contact resistance decreases with...

Page 131: ...x contains the information you need for register based programming The contents include Register Addressing Page 129 Register Descriptions Page 133 Program Timing and Execution Page 139 Programming Ex...

Page 132: ...rting location of the register addresses LADDR is the multiplexer s logical address and 6410 is the number of address bytes per VXI device For example the multiplexer s factory set logical address is...

Page 133: ...ere 1FC000h 2 080 768 is the starting location of the VXI A16 addresses LADDR is the multiplexer s logical address and 64 is the number of address bytes per register based device Again the multiplexer...

Page 134: ...e block of 64 address bytes For example the multiplexer s Status Control Register has an offset of 04h When you write a command to this register the offset is added to the base address to form the reg...

Page 135: ...015 032 047 Base 20h Relay Control Register 1 22h R W Bank 1 Channels CH 016 031 048 063 Base 22h Relay Control Register 2 24h R W Bank 2 Channels CH 064 079 096 111 Base 24h Relay Control Register 3...

Page 136: ...ce The Programming Example on page 141 shows how to read the ID Register Device Type Register Reading the Device Type Register returns 026Bh decimal 619 which identifies the device as the Agilent E846...

Page 137: ...rrupts are disabled bit 6 set and interrupt level is set to 1 bits 10 9 8 001 WRITE BITS Control Register bit 0 R Writing a 1 to bit 0 resets the module to the power on state all channels open Allow a...

Page 138: ...Control Register 4 Base 28h Bank 0 Channels 000 015 Relay Control Register 0 base 20h base 20h 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Write ch015 ch014 ch013 ch012 ch011 ch010 ch009 ch008 ch007 ch006...

Page 139: ...5 ch004 ch003 ch002 ch001 ch000 Read base 2Ch 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Write ch015 ch014 ch013 ch012 ch011 ch010 ch009 ch008 ch007 ch006 ch005 ch004 ch003 ch002 ch001 ch000 Read base 2Eh...

Page 140: ...bit 0 in the Status Control Register to reset the Multiplexer Reading the Relay Control Registers Reading the Relay Control Registers returns a hexadecimal number A bit that is 1 represents a channel...

Page 141: ...the program Closing Channels The following flowchart shows how to close or open a multiplexer channel and determine when it has finished closing or opening Comments The address of the multiplexer Sta...

Page 142: ...Comments Multiplexer Status Register bit 7 BUSY bit is monitored to determine when a channel can be closed or opened and when a channel has finished closing or opening Multimeter status bit 0 ready f...

Page 143: ...onstrate how to program the multiplexer in register format This example includes Reading the ID Device Type and Status Registers Closing Opening a channel Stand Alone Multiplexer Measurements Scanning...

Page 144: ...B0 9 14 INSTR VI_NULL VI_NULL mux Read ID and Device Type Registers read the multiplexer s ID and Device Type registers err viIn16 mux VI_A16_SPACE 0x00 id_reg if err VI_SUCCESS err_handler mux err pr...

Page 145: ...iClose mux viClose defaultRM end of main Error Handling Function void err_handler ViStatus err char err_msg 1024 0 viStatusDesc mux err err_msg printf ERROR s n err_msg return end of error handler rou...

Page 146: ...144 Register Based Programming...

Page 147: ...Described Number Range Error Types Description 199 to 100 Command Errors syntax and parameter errors See the Agilent E1405 E1406 Command Module User s Manual for a description of these errors 299 to 2...

Page 148: ...lid card number Addressing a module card in a switchbox that is not part of the switchbox 2001 Invalid channel number Attempting to address a channel of a module in a switchbox that is not supported b...

Page 149: ...ard event summary bit 101 summary bit 103 Boolean Command Parameters 69 boolean parameters 69 Bus connecting a channel to the analog 37 scanning channels using the analog 43 C Card Numbers 30 Changing...

Page 150: ...tecting error 53 reset 35 Configuring 11 11 11 11 11 11 11 Connecting analog bus 99 Connecting a Channel to the Analog Bus 37 Connecting User Inputs 18 Continuous Scanning Cycles 81 Control Relays clo...

Page 151: ...tial Operation 32 INITiate CONTinuous 81 CONTinuous 82 INITiate Subsystem 81 81 82 82 INITiate IMMediate 82 Inputs connecting user 18 L LADDR 130 Linking Commands 70 linking commands 68 Logical Addres...

Page 152: ...rogram execution 139 Program Timing 139 Program Timing and Execution 139 Programming Register based 129 Programming Examples 141 Programming the Multiplexer 29 Programs Example 33 Q Query analog bus p...

Page 153: ...100 100 Routing Relays reset condition 118 RST 106 118 Common Commands RST 106 118 S Saving States 52 Scan Channels using BUS triggers with an external device to 51 Scan Complete Bit 101 using the exa...

Page 154: ...ent SCPI 67 Standard Event Register 101 Standard Event Status Register 101 101 Standard Event Summary Bit 101 Starting scan 71 scanning cycles 81 82 scanning process 82 States recalling 52 recalling a...

Page 155: ...g 84 84 enabling 84 84 85 query state of 85 TRIGger SLOPe 110 SLOPe 111 SOURce 111 112 112 112 SOURce 113 Trigger bus inputs 112 external inputs 111 query source 113 source 111 TRIGger Subsystem 110 1...

Page 156: ...154 Index...

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